Evolution behavior of liquid film in the heat-affected zone of laser cladding non-weldable nickel-based superalloy

Zhang, Zhenlin; Zhao, Yue; Jing, Shan; Wu, Aiping; Sato, Yutaka; Tokita, Shun; Kadoi, Kota; Inoue, Hiroshige; Gu, Hui; Tang, Xiaohong

doi:10.1016/j.jallcom.2020.158463

Cited by 27 publications

(4 citation statements)

References 27 publications

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“…The area fraction of these carbides was approximately 0.7%. The main secondary structure in CM247LC alloy solidification processes (such as casting and additive manufacturing) is known to be MC-type carbide [2,3,16,18], and this structure was also observed in the pre-weld FZ. Figure 2(c) shows the EPMA results for area ‘A’ in Figure 2(a).…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the local liquation reactions that contribute to the liquation cracking can be suppressed using low heat input welding processes, such as laser welding. Therefore, several studies have investigated the use of laser welding for repairing non-weldable and precipitation-hardened superalloys, such as IC10 [15] and K447A [16]. However, in both cases, the liquation cracks could not be eliminated; specifically, further investigations are required to develop precise and low heat input laser welding processes for obtaining sound repair welds.…”

Section: Introductionmentioning

confidence: 99%

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Liquation cracking susceptibility of remelted and reheated weld metals in CM247LC superalloy using multi-bead Varestraint testing

Chun

Jeong

Seo

et al. 2023

Science and Technology of Welding and Joining

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The liquation cracking temperature range (LCTR) of CM247LC was evaluated, especially in remelted and reheated weld metals produced during multi-pass repair welding. The LCTR of the remelted weld metal was 282 K, and those of the reheated weld metals were 455-805 K depending on the testing position. In the multi-bead within the reheated weld metal, the LCTR increased from 455 K far from the inter-pass boundary to 805 K near this boundary. The mechanism underlying the varying LCTR for the remelted and reheated weld metals was the amount of MC carbide at each weld position. The single-mode fibre laser welding suppressed the carbide within both areas, and lowered the liquation cracking susceptibility.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Liquation cracking susceptibility of remelted and reheated weld metals in CM247LC superalloy using multi-bead Varestraint testing

Chun

Jeong

Seo

et al. 2023

Science and Technology of Welding and Joining

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“…Laser cladding technology, as a modern surface treatment technology, has the characteristics of a short production time, high bonding strength, low dilution ratio, small heat-affected zone, and strong design flexibility [50][51][52]. In the process of laser cladding, the composite coating undergoes repeated rapid heating and cooling cycles, leading to complex non equilibrium solid phase transitions, which will significantly affect the microstructure and performance, thus affecting the service life of parts under harsh working conditions [53]. Laser cladding technology, as a modern surface treatment technology, has the characteristics of a short production time, high bonding strength, low dilution ratio, small heat-affected zone, and strong design flexibility [50][51][52].…”

Section: Laser Cladding Technologymentioning

confidence: 99%

A Review of Research on Improving Wear Resistance of Titanium Alloys

Chen,

Zhang,

Wang

et al. 2024

Coatings

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Titanium alloy is widely used as oil drill pipe material because of its light weight, high strength, good toughness, corrosion resistance, fatigue resistance, and good process performance. However, due to its low hardness, poor wear resistance, serious oxidation at high temperature (700 °C), and difficulty in lubrication, in oil and gas field exploration and development drilling, especially in deep wells, high displacement wells, horizontal wells, and highly deviated wells, wear and tear are prone to occur. The application and development of titanium alloys are greatly limited. This paper introduces the research status of the common surface modification technologies of titanium alloys, such as laser cladding, magnetron sputtering, plasma spraying, micro arc oxidation, etc. It points out the improvement effect of various modification technologies on the wear resistance and high-temperature oxidation resistance of titanium alloys and discusses the advantages and disadvantages of various modification technologies. A proposed method for enhancing the wear resistance and high-temperature oxidation resistance of titanium alloys was finally introduced, and its potential for future development was investigated.

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“…Meanwhile, the extremely high rate of cooling during LMD of up to 10 6 K/s leads to high residual stress. Additionally, Al and Ti are the most common alloy elements used for deposition-strengthened alloys, and upon precipitation of the strengthening phase, γ′ (Ni 3 (Al, Ti)) is likely to be observed [ 4 ]. Typically, the alloy cannot be welded if the overall content of Al and Ti exceeds 6 wt.% [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Crack Inhibition and Performance Modification of NiCoCr-Based Superalloy with Y2O3 Nanoparticles by Laser Metal Deposition

et al. 2023

Materials

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A new precipitation strengthening NiCoCr-based superalloy with favorable mechanical performance and corrosion resistance was designed for ultra-supercritical power generation equipment. The degradation of mechanical properties and steam corrosion at high temperatures put forward higher requirements for alternative alloy materials; however, when the superalloy is processed to form complex shaped components through advanced additive manufacturing techniques such as laser metal deposition (LMD), hot cracks are prone to appear. This study proposed that microcracks in LMD alloys could be alleviated with powder decorated by Y2O3 nanoparticles. The results show that adding 0.5 wt.% Y2O3 can refine grains significantly. The increase in grain boundaries makes the residual thermal stress more uniform to reduces the risk of hot cracking. In addition, the addition of Y2O3 nanoparticles enhanced the ultimate tensile strength of the superalloy at room temperature by 18.3% compared to original superalloy. The corrosion resistance was also improved with 0.5 wt.% Y2O3, which was attributed to the reduction of defects and the addition of inert nanoparticles.

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Evolution behavior of liquid film in the heat-affected zone of laser cladding non-weldable nickel-based superalloy

Cited by 27 publications

References 27 publications

Liquation cracking susceptibility of remelted and reheated weld metals in CM247LC superalloy using multi-bead Varestraint testing

Liquation cracking susceptibility of remelted and reheated weld metals in CM247LC superalloy using multi-bead Varestraint testing

A Review of Research on Improving Wear Resistance of Titanium Alloys

Crack Inhibition and Performance Modification of NiCoCr-Based Superalloy with Y2O3 Nanoparticles by Laser Metal Deposition

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